METHOD FOR JUDGMENT OF DRINKING USING DIFFERENTIAL ENERGY IN TIME DOMAIN, RECORDING MEDIUM AND DEVICE FOR PERFORMING THE METHOD

• US 20170135620A1
• Filed: 04/02/2014
• Published: 05/18/2017
• Est. Priority Date: 03/28/2014
• Status: Active Grant

• Current Assignee: Foundation of Soongsil University-Industry Cooperation
• Original Assignee: Foundation of Soongsil University-Industry Cooperation
• Inventors: BAE, Myung Jin, LEE, Sang Gil, BAE, Seong Geon
• Granted Patent: US 9,943,260 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 5/18 for vehicle drivers or machine operators
• CPC Class Codes: A61B 5/4803 Speech analysis specially adapted for diagnostic purposes
• CPC Class Codes: A61B 5/4845 Toxicology, e.g. by detection of alcohol, drug or toxic products A61B5/4848 takes precedence
• CPC Class Codes: A61B 5/7264 Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems neural networks per se G06N3/00; expert systems per se G06N5/00
• CPC Class Codes: B60K 28/06 responsive to incapacity of driver
• CPC Class Codes: G10L 25/21 the extracted parameters being power information
• CPC Class Codes: G10L 25/30 using neural networks
• CPC Class Codes: G10L 25/66 for extracting parameters related to health condition detecting or measuring for diagnostic purposes A61B5/00

Abstract

An alcohol consumption determination method includes detecting a plurality of effective frames of an input voice signal; detecting a difference in signal of within the original signal of each of the effective frames; detecting average energy of the original signal and average energy of the difference signal for each of the effective frames; and determining whether alcohol has been consumed based on a difference between the average energy of the original signal and the average energy of the difference between the signals for each effective frame. Accordingly, it is also possible to determine, from a remote location, whether a driver or an operator remote has consumed alcohol and the degree of inebriation by using a difference signal energy method using a voice signal, thus preventing an accident caused by a operation vehicles and machines under the influence of alcohol.

Claims

1-14. -14. (canceled)

15. A method for determining whether a person is drunk comprising:

forming a plurality of effective frames of an input voice signal from said person;

generating an original signal of each of the plurality of effective frames and a difference signal of the original signal;

computing a first average energy of the original signal and a second average energy of the difference signal for each of the plurality of effective frames; and

determining whether said person is drunk based on a difference between the computed first average energy and the computed second average energy.

16. The method of claim 15, wherein the forming a plurality of effective frames of an input voice signal from said person comprises:

forming a voice frame of the input voice signal; and

determining whether the formed voice frame corresponds to a voiced sound.

17. The method of claim 16, wherein the determining whether the formed voice frame corresponds to a voiced sound comprises:

extracting periodic characteristics of harmonics or features from the formed voice frame, and

determining whether the formed voice frame is from a voiced sound, an unvoiced sound,

or background noise based on the extracted periodic characteristics of harmonics or features.

18. The method of claim 17, wherein periodic characteristics of harmonics or features comprise root mean square energy (RMSE) or zero-crossing count (ZC) of a low-band voice signal energy area.

19. The method of claim 18, wherein the determining whether the formed voice frame is from a voiced sound, an unvoiced sound, or background noise based on the extracted periodic characteristics of harmonics or features comprises use of neural network.

20. The method of claim 15, wherein the generating an original signal of each of the plurality of effective frames and a difference signal of the original signal comprises:

generating an original signal S(n) of the formed effective frame;

generating a shift signal S(n−

1) by shifting the original signal S(n); and

generating a difference signal S(n)−

S(n−

1) between the original signal S(n) and the shift signal S(n−

1).

21. The method of claim 20, wherein the difference signal S(n)−

S(n−

1) comprises a characteristic of highlighting high-frequency components.

22. The method of claim 15, wherein the computing a first average energy of the original signal and a second average energy of the difference signal for each of the plurality of effective frames comprises:

computing a first average energy of the original signal for each of the plurality of effective frames; and

computing a second average energy of the difference signal for each of the plurality of effective frames.

23. The method of claim 15, wherein the determining whether said person is drunk based on a difference between the computed first average energy and the computed second average energy comprises:

calculating a difference between the computed first average energy and the computed second average energy for each of the plurality of effective frames;

counting the number of effective frames each having the calculated difference greater than a predetermined first threshold; and

determining that said person is drunk when the counted number is greater than a predetermined second threshold and outputting a result of the determination.

24. The method of claim 15, wherein the determining whether said person is drunk based on a difference between the computed first average energy and the computed second average energy comprises:

calculating a difference between the computed first average energy and the computed second average energy for each of the plurality of effective frames;

counting the number of effective frames each having the calculated difference greater than a predetermined first threshold;

computing a ratio between the counted number and the total number of effective frames; and

determining that said person is drunk when the computed ratio is greater than a predetermined third threshold and outputting a result of the determination.

25. A computer-readable recording medium having a computer program recorded thereon for performing the method of claim 15 of determining whether a person is drunk.

26. A device for determining whether a person is drunk comprising:

an effective frame detection unit configured to detect a plurality of effective frames of an input voice signal from said person;

a difference signal detection unit configured to detect a difference signal of an original signal of each of the plurality of effective frames;

an energy detection unit configured to detect a first average energy of the original signal and a second average energy of the difference signal for each of the plurality of effective frames; and

an alcohol consumption determination unit configured to determine whether said person is drunk based on a difference between the first average energy of the original signal and the second average energy.

27. The device of claim 26, wherein the effective frame detection unit comprises:

a frame forming unit configured to form a voice frame of the input voice signal from said person; and

a voiced sound determination unit configured to determine whether the formed voice frame corresponds to a voiced sound.

28. The device of claim 26, wherein the difference signal detection unit comprises a shift signal unit configured to generate a shift signal S(n−

1) by shifting the original signal S(n) of the effective frame; and

a difference signal output unit configured to output a difference signal S(n)−

S(n−

1) between the original signal and the shift signal.

29. The device of claim 26, wherein the energy detection unit comprises:

a first energy detection unit configured to compute a first average energy of the original signal for each of the plurality of effective frame; and

a second energy detection unit configured to compute a second average energy of the difference signal for each of the plurality of effective frame.

30. The device of claim 26, wherein the alcohol consumption determination unit comprises:

an energy comparison unit configured to calculate a difference between the computed first average energy and the computed second average energy for each of the plurality of effective frames and outputting the calculated difference;

a counting unit configured to count the number of effective frames each having the calculated difference greater than a predetermined first threshold; and

a result output unit configured to determine that said person is drunk when the counted number is greater than a predetermined second threshold and outputting a result of the determination.

31. The device of claim 30, wherein the alcohol consumption determination unit further comprises a storage unit configured to prestore at least one of the first threshold and the second threshold.

32. The device of claim 26, wherein the alcohol consumption determination unit comprises:

an energy comparison unit configured to calculate a difference between the computed first average energy and the computed second average energy for each of the plurality of effective frames and outputting the calculated difference;

a counting unit configured to count the number of effective frames each having the calculated difference greater than a predetermined first threshold;

a ratio calculation unit configured to compute a ratio between the counted number and the total number of effective frames; and

a result output unit configured to determine that said person is drunk when the computed ratio is greater than a predetermined third threshold and outputting a result of the determination.

33. The device of claim 32, wherein the alcohol consumption determination unit further comprises a storage unit configured to prestore at least one of the first threshold and the third threshold.

34. A portable device comprising the device of claim 26 for determining whether a person is drunk.